Document and Entity Information [Abstract] Document and Entity Information Document Type Amendment Flag Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Trading Symbol Title of 12(b) Security Entity Interactive Data Current Entity Common Stock, Shares Outstanding Entity Emerging Growth Company Entity Small Business Entity Current Reporting Status Entity Shell Company CONSOLIDATED BALANCE SHEETS Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value End of period Beginning of period Cash and cash equivalents Accounts Receivable, Net, Current Accounts receivable, net of allowances of $3,140 and $3,364, respectively Contract with Customer, Asset, Net, Current Contract assets, net of allowances of $432 and $147, respectively Contract assets, net Contract assets, net Insurance Settlements Receivable, Current Current portion of receivable for insurance claims in excess of deductibles Income Taxes Receivable, Current Refundable income taxes Other Assets, Current Other current assets Assets, Current Total current assets Property, Plant and Equipment, Net Property and equipment, net of accumulated depreciation of $276,252 and $272,865, respectively Operating Lease, Right-of-Use Asset Operating lease right-of-use assets Goodwill Goodwill Intangible Assets, Net (Excluding Goodwill) Intangible assets, net of accumulated amortization of $12,108 and $10,880, respectively Insurance Settlements Receivable, Noncurrent Receivable for insurance claims in excess of deductibles Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Investment in joint venture Other Assets, Noncurrent Other assets Assets Total assets Liabilities [Abstract] Liabilities LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities, Current [Abstract] Current Current liabilities: Long-term Debt, Current Maturities Less: current portion of equipment notes Less: current portion of long-term debt Current portion of long-term debt Operating Lease, Liability, Current Less: current portion of finance and operating lease obligations Current portion of operating lease obligations Operating lease obligations Finance Lease, Liability, Current Less: current portion of finance and operating lease obligations Current portion of finance lease obligations Finance lease obligation Accounts Payable, Current Accounts payable Contract with Customer, Liability, Current Contract liabilities Contract liabilities Contract liabilities Self Insurance Reserve, Current Current portion of accrued self-insurance Other Liabilities, Current Other current liabilities Liabilities, Current Total current liabilities Deferred Income Tax Liabilities, Net Deferred income tax liabilities Long-term Debt, Excluding Current Maturities Long-term principal obligations Long-term debt Long-term debt Self Insurance Reserve, Noncurrent Accrued self-insurance Operating Lease, Liability, Noncurrent Operating lease obligations Operating lease obligations, net of current maturities Long-term finance and operating lease obligations Long-term finance and operating lease obligations Finance Lease, Liability, Noncurrent Finance lease obligations, net of current maturities Finance lease obligations Other Liabilities, Noncurrent Other liabilities Liabilities Total liabilities Commitments and Contingencies. Commitments and contingencies Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity: Preferred Stock, Value, Outstanding Preferred stock-$0.01 par value per share; 4,000,000 authorized shares; none issued and outstanding at March 31, 2020 and December 31, 2019 Common Stock, Value, Issued Common stock-$0.01 par value per share; 100,000,000 authorized shares;16,684,917 and 16,648,616 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively Additional Paid in Capital, Common Stock Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated other comprehensive loss Retained Earnings (Accumulated Deficit) Retained earnings Stockholders' Equity Attributable to Parent Total stockholders' equity attributable to MYR Group Inc. Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interest Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Balance Balance Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Allowance for Doubtful Accounts Receivable, Current Allowance for doubtful accounts receivable Contract with Customer, Asset, Accumulated Allowance for Credit Loss, Current Allowance for doubtful accounts associated with contract assets Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, accumulated depreciation Finite-Lived Intangible Assets, Accumulated Amortization Intangible assets, accumulated amortization Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Preferred Stock, Shares Authorized Preferred stock, shares authorized (in shares) Preferred Stock, Shares Issued Preferred stock, shares issued (in shares) Preferred Stock, Shares Outstanding Preferred stock, shares outstanding (in shares) Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, shares authorized (in shares) Common Stock, Shares, Issued Common stock, shares issued (in shares) Common Stock, Shares, Outstanding Common stock, shares outstanding (in shares) UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME Contract revenues Revenue from Contract with Customer, Excluding Assessed Tax Contract revenues Amount Contract revenues Cost of Goods and Services Sold Contract costs Gross Profit Gross profit Selling, General and Administrative Expense Selling, general and administrative expenses Amortization of Intangible Assets Amortization of intangible assets Gain (Loss) on Disposition of Property Plant Equipment Gain on sale of property and equipment Gain on sale of property and equipment Operating Income (Loss) Income from operations Income from operations Increase (decrease) in operating income Nonoperating Income (Expense) [Abstract] Other income (expense): Investment Income, Interest Interest income Interest Expense Interest expense Other Nonoperating Income (Expense) Other income (expense), net Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income before provision for income taxes Income tax expense Income Tax Expense (Benefit) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income Net Income (Loss) Attributable to Noncontrolling Interest. Less: net loss attributable to noncontrolling interest Less: net loss attributable to noncontrolling interest Net Income (Loss) Attributable to Parent Net income attributable to MYR Group Inc. Net income attributable to MYR Group Inc. Increase (decrease) in net income Earnings Per Share. Income per common share attributable to MYR Group Inc.: Earnings Per Share, Basic Basic (in dollars per share) Basic (in dollars per share) Earnings Per Share, Diluted Increase (decrease) in diluted earnings per common share (in dollars per share) Diluted (in dollars per share) Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average number of common shares and potential common shares outstanding: Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Weighted average common shares outstanding, diluted (in shares) Diluted (in shares) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income (loss): Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Foreign currency translation adjustment Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss) Other comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total comprehensive income attributable to MYR Group Inc. Statement of Stockholders' Equity Statement [Table] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Preferred Stock [Member] Preferred Stock [Member] Common Stock [Member] Common Stock [Member] Additional Paid In Capital [Member] Additional Paid-In Capital [Member] Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss) [Member] Retained Earnings [Member] Retained Earnings [Member] Parent [Member] MYR Group Inc. Stockholders' Equity [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Shares, Outstanding Balance (in shares) Balance (in shares) Cumulative Effect of New Accounting Principle in Period of Adoption Cumulative-effect adjustment to retained earnings Adjustment to adopt ASC 326 Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Stock issued under compensation plans, net Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Stock issued under compensation plans, net (in shares) Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock-based compensation expense Stock Repurchased and Retired During Period, Value Shares repurchased Stock Repurchased and Retired During Period, Shares Shares repurchased (in shares) Stock Issued During Period, Value, Other Stock issued-other Stock Issued During Period, Shares, Other Stock issued - other (in shares) UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash flows provided by (used in) operating activities: Depreciation Depreciation and amortization of property and equipment Share-based Compensation Stock-based compensation expense Deferred Income Taxes and Tax Credits Deferred income taxes Other Noncash Income (Expense), Total Other non-cash items Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities, net of acquisitions: Increase (Decrease) in Accounts Receivable Accounts receivable, net Increase (Decrease) in Contract with Customer, Asset Contract assets, net Changes in contract assets, net Changes in contract assets, net Increase (Decrease) in Insurance Settlements Receivable Receivable for insurance claims in excess of deductibles Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Contract with Customer, Liability Changes in contract liabilities Contract liabilities Increase (Decrease) in Self Insurance Reserve Accrued self-insurance Increase (Decrease) in Other Operating Liabilities Other liabilities Net Cash Provided by (Used in) Operating Activities Net cash flows provided by (used in) operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Proceeds from Sale of Property, Plant, and Equipment Proceeds from sale of property and equipment Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Net Cash Provided by (Used in) Investing Activities Net cash flows used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Proceeds from (Repayments of) Lines of Credit Net borrowings (repayments) under revolving lines of credit Repayments of Notes Payable Payment of principal obligations under equipment notes Finance Lease, Principal Payments Payment of principal obligations under finance leases Proceeds from Stock Options Exercised Proceeds from exercise of stock options Payments for Repurchase of Common Stock Repurchase of common shares Proceeds from (Payments for) Other Financing Activities Other financing activities Net Cash Provided by (Used in) Financing Activities Net cash flows provided by (used in) financing activities Effect of Exchange Rate on Cash Effect of exchange rate changes on cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, at Carrying Value [Abstract] Cash and cash equivalents: Organization, Business and Basis of Presentation Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Organization, Business and Basis of Presentation Acquisition Business Combination Disclosure [Text Block] Acquisition Contract Assets and Liabilities Long-term Contracts or Programs Disclosure [Text Block] Contract Assets and Liabilities Lease Obligations The entire disclosure for lessee, operating and finance leases. Lessee Operating And Finance Leases [Text Block] Lease Obligations Fair Value Measurements Fair Value Disclosures [Text Block] Fair Value Measurements Debt Debt Disclosure [Text Block] Debt Revenue Recognition Revenue from Contract with Customer [Text Block] Revenue Recognition Income Taxes Income Tax Disclosure [Text Block] Income Taxes Commitments and Contingencies Commitments Contingencies and Guarantees [Text Block] Commitments and Contingencies Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Segment Information Segment Reporting Disclosure [Text Block] Segment Information Noncontrolling Interest Noncontrolling Interest Disclosure [Text Block] Noncontrolling Interest Earnings Per Share [Text Block] Earnings Per Share Subsequent Event Subsequent Events [Text Block] Subsequent Event Consolidation, Policy [Policy Text Block] Interim Consolidated Financial Information Foreign Currency Transactions and Translations Policy [Policy Text Block] Foreign Currency Use of Estimates, Policy [Policy Text Block] Use of Estimates New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Pronouncements Fair Value Measurement, Policy [Policy Text Block] Fair Value Measurements Earnings Per Share, Policy [Policy Text Block] Earnings Per Share Contract with Customer, Asset and Liability [Table Text Block] Schedule of contract assets and liabilities from contracts with customers Costs in Excess of Billings and Billings in Excess of Costs [Table Text Block] Schedule of net asset position for contracts in process Schedule of supplemental balance sheet information related to leases. Schedule of Supplemental Balance Sheet Information Related to Leases [Table Text Block] Summary of the lease-related assets and liabilities Schedule of summary of the lease terms and discount rates. Schedule Of Summary Of The Lease Terms And Discount Rates [Table Text Block] Summary of the lease terms and discount rates Lease, Cost [Table Text Block] Schedule of lease costs Tabular disclosure of lease supplemental cash flow and other disclosures. Schedule Of Lease Supplemental Cash Flow And Other Disclosures [Table Text Block] Summary of supplemental cash flow information Finance Lease, Liability, Maturity [Table Text Block] Schedule of future minimum finance lease payments Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of future minimum operating lease payments Schedule of Long-term Debt Instruments [Table Text Block] Schedule of total debt Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of remaining principal payments for long term obligations Disaggregation of Revenue [Table Text Block] Schedule of revenue by contract and market type Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Schedule of amount of the remaining performance obligations that the company reasonably estimates will not be recognized within the next twelve months Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of segment's internal financial reports Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of weighted average number of common shares used to compute basic and dilute earnings per share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of shared excluded from calculation of dilute securities Organization Consolidation and Presentation of Financial Statements [Table] Organization Consolidation and Presentation of Financial Statements [Line Items] Number of Reportable Segments Number of business segments (segment) Number of business segments (segment) Foreign Currency Transaction Gain (Loss), before Tax Foreign currency gains Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Estimate of Transaction Price Revenue recognized, related to change orders and claims included as contract price adjustments Percentage of increase (decrease) cost estimate revision gross margin. Cost Estimate Revision Gross Margin Increase Decrease Percentage Increase (decrease) in consolidated gross margin Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Line Items] Amount of preliminary estimated net asset adjustments consisting of acquisition-date fair value. Business Combination Preliminary Estimated Net Asset Adjustments Preliminary estimated net asset adjustments Business Combination, Consideration Transferred Total consideration, net of net asset adjustments Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Change in contingent consideration Contract with Customer, Liability, Revenue Recognized Revenues recognized during period n/a Schedule of Contractors [Table] Net Period [Axis] Net Period [Domain] Net Period [Domain] Net Period Change [Member] Net Period Change [Member] n/a Contractors [Line Items] Unbilled Contracts Receivable Unbilled revenue, net Unbilled revenue Contract Receivable Retainage Contract retainages, net The amount of contract with customer, increase (decrease) during the reporting period of the amount of revenue for work performed for which billing has not occurred, net of uncollectible accounts. Revenue From Contract With Customer Increase Decrease In Unbilled Receivables Changes in unbilled revenue, net The increase (decrease) during the reporting period of the amount of contract receivable retainage. Increase Decrease In Contract Receivable Retainage Changes in contract retainages, net Its represent the contract with customer, liability excluding provision for loss on contracts, current. Contract With Customer Liability Excluding Provision For Loss On Contracts Current Deferred revenue Deferred revenue Provision for Loss on Contracts Accrued loss provision Changes in deferred revenue Increase (Decrease) in Deferred Revenue The increase (decrease) during the reporting period of the amount of accrued loss provision. Increase Decrease In Accrued loss provision Changes in accrued loss provision The amount of net contract assets(liabilities) as at balance sheet period. Net Contract Assets Liabilities Net contract assets (liabilities) Increase (Decrease) in Payables to Customers Changes in contract liabilities The amount of increase(decrease)in net contract assets(liabilities) during the year. Increase decrease in Net Contract Assets Liabilities Changes in net contract assets (liabilities) Represents the aggregate of costs incurred on uncompleted contracts and estimated earnings. Aggregate Costs Incurred On Uncompleted Contracts And Estimated Earnings Costs and estimated earnings on uncompleted contracts Represents the billings to date on uncompleted contracts accounted for under the percentage-of-completion method. Billings To Date Less: billings to date Represents the net costs and estimated earnings in excess of billings on uncompleted contracts accounted for under the percentage-of-completion method. Net Costs And Estimated Earnings In Excess Of Billings Net asset position for contracts in process n/a Schedule of Operating And Finance Leases, Disclosure [Table] n/a Operating And Finance Leases [Line Items] Lessee operating and finance leases remaining contract term. Lessee Operating and Finance Leases Remaining Contract Term Remaining lease term Lessee, operating and finance leases, option to extend, term. Lessee Operating and Finance Leases Option to Extend Term Option to extend lease term (up to) Lessee, operating and finance leases, option to terminate, period. Lessee Operating and Finance Leases Option to Terminate Period Option to terminate leases, period Lessee, Operating Lease, Liability, Payments, Due Minimum lease payments required Total minimum lease payments It represents Lessee Operating Lease Amortization Period. Lessee Operating Lease Amortization Period Lease amortization period Servicing Asset [Abstract] Assets Finance Lease, Right-of-Use Asset Finance lease right-of-use assets Represent the operating and finance lease right-of-use asset. Operating and Finance Lease Right of Use Asset Total right-of-use lease assets Represents the lease obligation, current Lease Obligation Current Total current obligations Liabilities, Noncurrent [Abstract] Non-current Represent the lease obligation noncurrent. Lease Obligation Noncurrent Total non-current obligations Represent the lease obligation, total. Lease Obligation Total Total lease obligations Finance Lease, Weighted Average Remaining Lease Term Weighted-average remaining lease term - finance leases Operating Lease, Weighted Average Remaining Lease Term Weighted-average remaining lease term - operating leases Finance Lease, Weighted Average Discount Rate, Percent Weighted-average discount rate - finance leases Operating Lease, Weighted Average Discount Rate, Percent Weighted-average discount rate - operating leases Lease, Cost [Abstract] Finance lease cost: Finance Lease, Right-of-Use Asset, Amortization Amortization of right-of-use assets Finance Lease, Interest Expense Interest on lease liabilities Operating Lease, Cost Operating lease cost Short-term Lease, Cost Short-term lease cost Variable Lease, Cost Variable lease costs Lease, Cost Total lease cost Supplemental Cash Flow Information [Abstract] Other information: Supplemental Cash Flow Information: Operating Lease, Payments Operating cash flow from operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Right-of-use asset obtained in exchange for new operating lease obligations Finance Lease Liabilities, Payments, Due [Abstract] Finance Lease Obligations Finance Lease, Liability, Payments, Remainder of Fiscal Year Remainder of 2020 Finance Lease, Liability, Payments, Due Year Two 2021 Finance Lease, Liability, Payments, Due Year Three 2022 Finance Lease, Liability, Payments, Due Year Four 2023 Finance Lease, Liability, Payments, Due Year Five 2024 Amount of lessee's undiscounted obligation for lease payments for finance lease, due in sixth fiscal year following latest fiscal year. Finance Lease Liability Payments Due Year Six 2025 Amount of lessee's undiscounted obligation for lease payments for finance lease, due after sixth fiscal year following latest fiscal year. Finance Lease Liability Payments Due After Year Six Thereafter Finance Lease, Liability, Payments, Due Total minimum lease payments Finance Lease, Liability, Undiscounted Excess Amount Financing component Finance Lease, Liability Net present value of minimum lease payments Operating Lease Liabilities, Payments Due [Abstract] Operating Lease Obligations Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year Remainder of 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five 2024 Amount of lessee's undiscounted obligation for lease payments for operating lease, due in sixth fiscal year following latest fiscal year. Lessee Operating Lease Liability Payments Due Year Six 2025 Amount of lessee's undiscounted obligation for lease payments for operating lease, due after sixth fiscal year following latest fiscal year. Lessee Operating Lease Liability Payments Due After Year Six Thereafter Lessee, Operating Lease, Liability, Undiscounted Excess Amount Financing component Operating Lease, Liability Net present value of minimum lease payments Total Lease Obligations [Abstract] Total Lease Obligations Amount of lessee's undiscounted obligation for lease payments for lease having an initial or remaining lease term in excess of one year due in remainder of fiscal year following latest fiscal year. Lease Liability Payments Remainder of Fiscal Year Remainder of 2020 Amount of lessee's undiscounted obligation for lease payments for lease, due in second fiscal year following latest fiscal year. Lease Liability Payments Due Year Two 2021 Amount of lessee's undiscounted obligation for lease payments for lease, due in third fiscal year following latest fiscal year. Lease Liability Payments Due Year Three 2022 Amount of lessee's undiscounted obligation for lease payments for lease, due in fourth fiscal year following latest fiscal year. Lease Liability Payments Due Year Four 2023 Amount of lessee's undiscounted obligation for lease payments for lease, due in fifth fiscal year following latest fiscal year. Lease Liability Payments Due Year Five 2024 Amount of lessee's undiscounted obligation for lease payments for lease, due in sixth fiscal year following latest fiscal year. Lease Liability Payments Due Year Six 2025 Amount of lessee's undiscounted obligation for lease payments for lease, due after sixth fiscal year following latest fiscal year. Lease Liability Payments Due After Year Six Thereafter Amount of lessee's undiscounted obligation for lease payments. Lease Liability Payments Due Total minimum lease payments Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments. Lease Liability Undiscounted Excess Amount Financing component Amount of total lease liability. Lease Liability Net present value of minimum lease payments Amount of lease liability classified as current. Lease Liability Current Less: current portion of finance and operating lease obligations Amount of lease liability classified as noncurrent. Lease Liability Noncurrent Long-term finance and operating lease obligations Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument Name [Domain] Debt Instrument, Name [Domain] Equipment Note One Equipment Note One [Member] Equipment Note One [Member] Equipment Note Two Equipment Note Two [Member] Equipment Note Two [Member] No definition available. Equipment Note Three [Member] Equipment Note Three [Member] No definition available. Equipment Note Four [Member] Equipment Note Four [Member] No definition available. Equipment Note Five [Member] Equipment Note Five [Member] Equipment note six member. Equipment Note Six [Member] Equipment Note Six [Member] Equipment note seven member. Equipment Note Seven [Member] Equipment Note Seven [Member] Represents the information pertaining to equipment Note 8. Equipment Note Eight [Member] Equipment Note Eight [Member] Represents the information pertaining to equipment note 9. Equipment Note Nine [Member] Equipment Note Nine [Member] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Long-term Debt, Type [Axis] Longterm Debt Type [Domain] Long-term Debt, Type [Domain] Notes Payable To Banks [Member] Notes Payable to Banks [Member] Debt Instrument [Line Items] Debt Instrument, Interest Rate, Stated Percentage Stated Interest Rate (per annum) Debt Instrument, Term Debt instrument term Term (years) Long-term Debt Total debt Total future principal payments Secured Debt [Member] Secured Debt [Member] Liability Class [Axis] Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain] Fair Value by Liability Class [Domain] Insurance Program Obligations Insurance Program Obligations [Member] Insurance Program Obligations [Member] Contract Performance Obligations [Member] Contract Performance Obligations [Member] Master Loan Agreement [Member]. Master Loan Agreement [Member] Master Loan Agreement [Member] Credit Agreement [Member]. Credit Agreement [Member] Credit Agreement [Member] Range [Axis] Range [Member] Range [Domain] Maximum [Member] Maximum [Member] Minimum [Member] Minimum [Member] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate L I B O R [Member] London Interbank Offered Rate (LIBOR) [Member] Base Rate [Member] Base Rate [Member] Performance Letters Of Credit [Member] Performance letters of credit [Member] Nonperformance Letters Of Credit [Member] Non-performance Letters Of Credit [Member] Letter Of Credit [Member] Letter of Credit [Member] Currency [Axis] All Currencies [Domain] All Currencies [Domain] C A [D] Canada, Dollars [Member] Line of Credit Facility, Maximum Borrowing Capacity Maximum borrowing capacity Represents the option to increase maximum borrowings on the credit facility. Line Of Credit Facility Option To Increase Maximum Borrowing Capacity Option to increase borrowing capacity Percentage of capital stock from direct foreign subsidiaries pledged as collateral for a debt. Percentage of Capital Stock From Direct Foreign Subsidiaries Percentage of capital stock from direct foreign subsidiaries Debt Instrument, Basis Spread on Variable Rate Interest rate margin Line of Credit Facility, Commitment Fee Percentage Letter of credit facility commitment percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Commitment fee on unused capacity Threshold of debt coverage ration at which the credit agreement restricts certain types of payments. Debt Instrument Covenant Leveraged Debt Ratio Restriction Debt instrument covenant leveraged debt ratio restriction Line of Credit Facility, Interest Rate During Period Interest rate on borrowings outstanding The Company has the option to expand the debt coverage ratio in the event of an acquisition. Leverage Coverage Ratio Leverage coverage ratio Represent the minimum interest coverage ratio under the credit agreement. Debt Instrument Covenant Interest Coverage Ratio Interest coverage ratio Amount of company's consolidated liquidity restricted. Debt Instrument Restricted Maximum Liquidity Debt instrument restricted maximum liquidity Letters of Credit Outstanding, Amount Letters of credit outstanding Debt Issuance Costs, Line of Credit Arrangements, Net Deferred debt issuance costs The number of debt instruments. Debt Instrument Number Of Debt Instruments Number of equipment notes (equipment note) Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year Remainder of 2020 Long-term Debt, Maturities, Repayments of Principal in Year Two 2021 Long-term Debt, Maturities, Repayments of Principal in Year Three 2022 Long-term Debt, Maturities, Repayments of Principal in Year Four 2023 Long-term Debt, Maturities, Repayments of Principal in Year Five 2024 Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the sixth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Long Term Debt Maturities Repayments Of Principal In Year Six 2025 Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the sixth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Long Term Debt Maturities Repayments Of Principal After Year Six Thereafter Disaggregation of Revenue [Table] Disaggregation of Revenue [Line Items] Term of master service agreements ("MSAs"), in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Master Service Agreements, Term Term of master service agreements Short termination notice of master service agreements ("MSAs"), in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact Master Service Agreements, Term of Short Termination Notice Short termination notice of master service agreements Revenue, Remaining Performance Obligation Remaining performance obligations Total, Remaining Performance Obligations Segments [Axis] Segment [Domain] Segments [Domain] Transmission And Distribution [Member] T&D [Member] Commercial And Industrial [Member] C&I [Member] Contract with Customer, Basis of Pricing [Axis] Contract With Customer Basis Of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] Fixed Price Contract [Member] Fixed-price Contract [Member] Unit Price Contract [Member] Unit Price Contract [Member] Te Contract [Member] TE Contract [Member] Other Contract [Member] Other Contract [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Revenue From Contract With Customer [Member] Revenue from Contract with Customer [Member] Concentration Risk, Percentage Concentration risk Contract with Customer, Sales Channel [Axis] Contract With Customer Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Market Type Transmission [Member] Market Type Transmission [Member] Market Type Distribution [Member] Market Type Distribution [Member] Market Type Electrical Construction [Member] Market Type Electrical construction [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Effective Income Tax Rate Reconciliation, Percent [Abstract] Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Federal statutory tax rate Effective Income Tax Rate Reconciliation, Percent Effective tax rate Unrecognized Tax Benefits Unrecognized tax benefits Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Interest and penalties of unrecognized tax benefits Other Commitments [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Domain] Loss Contingency, Nature [Domain] Contingencies Excluding Wildfire and Health Insurance [Member] Contingencies Excluding Wildfire And Health Insurance [Member] Contingencies Excluding Wildfire and Health Insurance [Member] Wildfire [Member] Wildfire [Member] Wildfire [Member] Health Insurance [Member] Health Insurance [Member] Health Insurance [Member] Guarantor Obligations, Nature [Axis] Guarantee Obligations Nature [Domain] Guarantor Obligations, Nature [Domain] Performance Guarantee [Member] Performance Guarantee [Member] Other Commitments [Line Items] Purchase Commitment, Remaining Minimum Amount Committed Purchase orders outstanding The terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations. Purchase Commitment Remaining Term Purchase orders outstanding, term amount of Deductible Insurance Policy for Loss Contingency Loss Contingency Insurance Policy Deductible Insurance coverage deductible Guarantor Obligations, Maximum Exposure, Undiscounted Bonds outstanding Its represents the guarantor obligations expected costs. Guarantor Obligations Expected Costs Estimated remaining costs for bonded projects Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Represents the number of equity stock based compensation plans. Number Of Equity Stock Based Compensation Plans Number of equity compensation plans (plan) The percentage of target shares, an employee can earn, under the plan. Share Based Compensation Arrangement By Share Based Payment Award Potential Payout As Percentage Of Target Shares Percentage of potential target shares awarded Shares granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Shares exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Shares vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Service period Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Shares exercised, weighted average exercise price (in dollars shares) Shares vested, weighted average grant date fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Award vesting period Amortization period Schedule of Segment Reporting Information, by Segment [Table] Ci [Member] C&I [Member] Geographical [Axis] Segment Geographical [Domain] Geographical [Domain] C [A] CANADA Segment Reporting Information [Line Items] Td [Member] T&D [Member] Corporate [Member] General Corporate [Member] Noncontrolling Interest [Table] Legal Entity [Axis] Entity [Domain] Entity [Domain] Huen Electric Inc Member Huen Electric Inc [Member] Huen Electric Inc [Member] Noncontrolling Interests [Line Items] Partners' Capital Account, Distributions Distributions to partners Partners' Capital Account, Contributions Capital contributions to joint venture Earnings Per Share Net Income (Loss) Attributable to Parent [Abstract] Numerator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Denominator: Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average dilutive securities (in shares) n/a Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities Name [Domain] Antidilutive Securities, Name [Domain] Performance Shares [Member] Performance awards [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive securities excluded from computation of earnings (in shares) Subsequent Event [Table] Subsequent Event [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Shares granted, weighted average grant date fair value (in dollars per share) Change in Accounting Estimate by Type [Axis] Change In Accounting Estimate Type [Domain] Change in Accounting Estimate, Type [Domain] Contracts Accounted For Under Percentage Of Completion [Member] Contracts Accounted for under Percentage of Completion [Member] Adjustments for New Accounting Pronouncements [Axis] Type Of Adoption [Member] Type of Adoption [Domain] Accounting Standards Update201613 [Member] Accounting Standards Update 2016-13 [Member] Business Acquisition [Axis] Business Acquisition Acquiree [Domain] Business Acquisition, Acquiree [Domain] Representing the information pertaining to CSI Electrical Contractors, Inc Csi Electrical Contractors Inc [Member] CSI Electrical Contractors, Inc [Member] Contingent Consideration by Type [Axis] Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Margin Guarantee [Member] Margin Guarantee [Member] Certain Performance Targets And Continued Employment Of Key Executives [Member] Certain Performance Targets and Continued Employment of Key Executives [Member] Related Party [Axis] Related Party [Domain] Related Party [Domain] Subsidiaries [Member] Subsidiaries [Member] Title of Individual [Axis] Title Of Individual With Relationship To Entity [Domain] Relationship to Entity [Domain] Employees [Member] Employees [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Award Type [Axis] Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Equity Award [Domain] Time Vested Stock Awards Member Time Vested Stock Awards [Member] Time vested stock awards [Member] Employee Stock Option [Member] Employee Stock Option [Member Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Longterm Incentive Plan [Member] Long-Term Incentive Plan [Member] Grantee Status [Axis] Grantee Status [Domain] Grantee Status [Domain] Share Based Payment Arrangement Nonemployee [Member] Non-employee [Member] Long term incentive plan. Long Term Incentive Plan [Member] Longterm Incentive Plan [Member] It represents performance shares award. Performance Shares Award [Member] Performance Shares Award [Member] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member]